genpreds.c (write_lookup_constraint): Do not compare first letter of the constraint again.

2013-02-20  Richard Biener  <rguenther@suse.de>

	* genpreds.c (write_lookup_constraint): Do not compare first
	letter of the constraint again.

From-SVN: r196167

gcc/ChangeLog

 2013-02-20  Richard Biener  <rguenther@suse.de>
 
+	* genpreds.c (write_lookup_constraint): Do not compare first
+	letter of the constraint again.
+
+2013-02-20  Richard Biener  <rguenther@suse.de>
+
 	* tree-ssa-loop-ivopts.c (alloc_use_cost_map): Use bitmap_count_bits
 	and ceil_log2.
 	(get_use_iv_cost): Terminate hashtable walk when coming across

gcc/genpreds.c

@@ -945,9 +945,10 @@ write_lookup_constraint (void)
 	{
 	  do
 	    {
-	      printf ("      if (!strncmp (str, \"%s\", %lu))\n"
+	      printf ("      if (!strncmp (str + 1, \"%s\", %lu))\n"
 		      "        return CONSTRAINT_%s;\n",
-		      c->name, (unsigned long int) c->namelen, c->c_name);
+		      c->name + 1, (unsigned long int) c->namelen - 1,
+		      c->c_name);
 	      c = c->next_this_letter;
 	    }
 	  while (c);